Tr'Shar, Many into One

Last strike, trample
Tr'Shar, Many into One enters the battlefield
tapped.
Whenever Tr'Shar, Many into One would enter
the graveyard, you may exile a creature card
from any graveyard. If you do, return
Tr'Shar, Many into One to the battlefield. You
gain X life. Where X is equal to the number of
cards exiled this way.